Shelving unit



FIG. 1 is a top front and left side perspective view of a shelving unit showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a rear elevational view; and,

FIG. 4 is a right side elevational view thereof.

FIGS. 2-4 have been shown on a reduced scale with respect to FIG. 1. 

The ornamental design for a shelving unit, as shown. 